$ git clone -n https://src.fedoraproject.org/rpms/resalloc-aws.git /var/lib/mock/f40-build-2638394-66297/root/chroot_tmpdir/scmroot/resalloc-aws
Cloning into '/var/lib/mock/f40-build-2638394-66297/root/chroot_tmpdir/scmroot/resalloc-aws'...
$ git fetch origin 0285d17514587302b9231e4332bc13195247c151:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/resalloc-aws
 * [new ref]         0285d17514587302b9231e4332bc13195247c151 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0285d17 Update resalloc-aws to 1.8-1