$ git clone -n https://src.fedoraproject.org/rpms/rust-backon.git /var/lib/mock/f45-build-40368-771/root/chroot_tmpdir/scmroot/rust-backon
Cloning into '/var/lib/mock/f45-build-40368-771/root/chroot_tmpdir/scmroot/rust-backon'...
$ git fetch origin 96e68386de8db3f389f9cb065a53e9fb79e6a377:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-backon
 * [new ref]         96e68386de8db3f389f9cb065a53e9fb79e6a377 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96e6838 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild