$ git clone -n https://src.fedoraproject.org/rpms/rust-image.git /var/lib/mock/f45-build-45158-821/root/chroot_tmpdir/scmroot/rust-image
Cloning into '/var/lib/mock/f45-build-45158-821/root/chroot_tmpdir/scmroot/rust-image'...
$ git fetch origin 971723e933d55c403d0042596af1a198d960c005:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-image
 * [new ref]         971723e933d55c403d0042596af1a198d960c005 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 971723e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild