$ git clone -n https://gitee.com/insight-kernel/glibc.git /var/lib/mock/dist-an23-build-511778-75070/root/chroot_tmpdir/scmroot/glibc
Cloning into '/var/lib/mock/dist-an23-build-511778-75070/root/chroot_tmpdir/scmroot/glibc'...
$ git fetch origin 3506e645f3f3628243e7d622b5af64e91fbc8d5e:KOJI_FETCH_HEAD
From https://gitee.com/insight-kernel/glibc
 * [new ref]         3506e645f3f3628243e7d622b5af64e91fbc8d5e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3506e64 Backport patches from upstream  to fix performance regression