$ git clone -n https://src.fedoraproject.org/rpms/merkaartor.git /var/lib/mock/f41-build-815483-149534/root/chroot_tmpdir/scmroot/merkaartor
Cloning into '/var/lib/mock/f41-build-815483-149534/root/chroot_tmpdir/scmroot/merkaartor'...
$ git fetch origin 29a956e94059a7b082b7f4750b7bd5768a4b508a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/merkaartor
 * [new ref]         29a956e94059a7b082b7f4750b7bd5768a4b508a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 29a956e Add date to fix build