$ git clone -n https://src.fedoraproject.org/rpms/resalloc-openstack.git /var/lib/mock/f45-build-34468-687/root/chroot_tmpdir/scmroot/resalloc-openstack
Cloning into '/var/lib/mock/f45-build-34468-687/root/chroot_tmpdir/scmroot/resalloc-openstack'...
$ git fetch origin c1841f8a74253701720a42964c1dbebeb833ea3f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/resalloc-openstack
 * [new ref]         c1841f8a74253701720a42964c1dbebeb833ea3f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1841f8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild