$ git clone -n https://src.fedoraproject.org/rpms/resalloc.git /var/lib/mock/f39-build-1540130-36468/root/chroot_tmpdir/scmroot/resalloc
Cloning into '/var/lib/mock/f39-build-1540130-36468/root/chroot_tmpdir/scmroot/resalloc'...
$ git fetch origin 01845884865b383b779314398c7e1d9cc726ec5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/resalloc
 * [new ref]         01845884865b383b779314398c7e1d9cc726ec5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0184588 New upstream release with "on demand" resources