$ git clone -n https://src.fedoraproject.org/rpms/rust-onig.git /var/lib/mock/f45-build-43527-803/root/chroot_tmpdir/scmroot/rust-onig
Cloning into '/var/lib/mock/f45-build-43527-803/root/chroot_tmpdir/scmroot/rust-onig'...
$ git fetch origin 04f09a1b50c742ac3944038f28a34f9b877bec09:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-onig
 * [new ref]         04f09a1b50c742ac3944038f28a34f9b877bec09 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04f09a1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild