$ git clone -n https://src.fedoraproject.org/rpms/fakechroot.git /var/lib/mock/f39-build-1918265-42933/root/chroot_tmpdir/scmroot/fakechroot
Cloning into '/var/lib/mock/f39-build-1918265-42933/root/chroot_tmpdir/scmroot/fakechroot'...
$ git fetch origin 24c4403b583f5f4cd2ab17a66cc463733644d30f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fakechroot
 * [new ref]         24c4403b583f5f4cd2ab17a66cc463733644d30f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 24c4403 Remove cp.t test which fails randomly since RHEL 6 or 7