$ git clone -n https://src.fedoraproject.org/rpms/dtkcore.git /var/lib/mock/f41-build-841756-161398/root/chroot_tmpdir/scmroot/dtkcore
Cloning into '/var/lib/mock/f41-build-841756-161398/root/chroot_tmpdir/scmroot/dtkcore'...
$ git fetch origin 48b55b29ed25b48b54e37dcf2f81483c504bbd76:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dtkcore
 * [new ref]         48b55b29ed25b48b54e37dcf2f81483c504bbd76 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48b55b2 5.6.32