$ git clone -n https://src.fedoraproject.org/rpms/cpuinfo.git /var/lib/mock/f41-build-2628628-25583/root/chroot_tmpdir/scmroot/cpuinfo
Cloning into '/var/lib/mock/f41-build-2628628-25583/root/chroot_tmpdir/scmroot/cpuinfo'...
$ git fetch origin 3cba849c6b55fe1521bcf81f2c06c50d25add00f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cpuinfo
 * [new ref]         3cba849c6b55fe1521bcf81f2c06c50d25add00f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3cba849 Update gitcommit