$ git clone -n https://src.fedoraproject.org/rpms/rust-line-numbers.git /var/lib/mock/f45-build-43000-799/root/chroot_tmpdir/scmroot/rust-line-numbers
Cloning into '/var/lib/mock/f45-build-43000-799/root/chroot_tmpdir/scmroot/rust-line-numbers'...
$ git fetch origin 88b99a9688d3edf52ffae0624c3321197f132ecd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-line-numbers
 * [new ref]         88b99a9688d3edf52ffae0624c3321197f132ecd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88b99a9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild