$ git clone -n https://src.fedoraproject.org/rpms/rust-roff0.2.git /var/lib/mock/f45-build-44475-814/root/chroot_tmpdir/scmroot/rust-roff0.2
Cloning into '/var/lib/mock/f45-build-44475-814/root/chroot_tmpdir/scmroot/rust-roff0.2'...
$ git fetch origin fd02e96e6781c45b56ec73261f63abd249c95dec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-roff0.2
 * [new ref]         fd02e96e6781c45b56ec73261f63abd249c95dec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd02e96 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild