$ git clone -n https://gitee.com/mgb01105731/gcc-toolset-15_1.git /var/lib/mock/dist-an23-build-537837-83445/root/chroot_tmpdir/scmroot/gcc-toolset-15_1
Cloning into '/var/lib/mock/dist-an23-build-537837-83445/root/chroot_tmpdir/scmroot/gcc-toolset-15_1'...
$ git fetch origin 3fa759ba4d4fd67a5a9423925f524c14bb5ee502:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/gcc-toolset-15_1
 * [new ref]         3fa759ba4d4fd67a5a9423925f524c14bb5ee502 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3fa759b Change the version of scl-utils