$ git clone -n https://src.fedoraproject.org/rpms/rust-slug.git /var/lib/mock/f45-build-45015-820/root/chroot_tmpdir/scmroot/rust-slug
Cloning into '/var/lib/mock/f45-build-45015-820/root/chroot_tmpdir/scmroot/rust-slug'...
$ git fetch origin 0547b6ea65b8602356c42c93675a2a63aadbe37b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-slug
 * [new ref]         0547b6ea65b8602356c42c93675a2a63aadbe37b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0547b6e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild