$ git clone -n https://src.fedoraproject.org/rpms/rust-twox-hash1.git /var/lib/mock/f45-build-45840-828/root/chroot_tmpdir/scmroot/rust-twox-hash1
Cloning into '/var/lib/mock/f45-build-45840-828/root/chroot_tmpdir/scmroot/rust-twox-hash1'...
$ git fetch origin 6879a3107fa6461ffe4af2b28ad0439c3350e409:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-twox-hash1
 * [new ref]         6879a3107fa6461ffe4af2b28ad0439c3350e409 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6879a31 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild