$ git clone -n https://src.fedoraproject.org/rpms/rust-keyframe.git /var/lib/mock/f45-build-42786-796/root/chroot_tmpdir/scmroot/rust-keyframe
Cloning into '/var/lib/mock/f45-build-42786-796/root/chroot_tmpdir/scmroot/rust-keyframe'...
$ git fetch origin f1fd0fa05cfaea7f37b3a058b4100922bcf7225c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-keyframe
 * [new ref]         f1fd0fa05cfaea7f37b3a058b4100922bcf7225c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1fd0fa Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild