$ git clone -n https://src.fedoraproject.org/rpms/rust-tracing-log.git /var/lib/mock/f45-build-45602-824/root/chroot_tmpdir/scmroot/rust-tracing-log
Cloning into '/var/lib/mock/f45-build-45602-824/root/chroot_tmpdir/scmroot/rust-tracing-log'...
$ git fetch origin dd0dd4405bd6aff8a35f04a6db75c81691f8b3a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tracing-log
 * [new ref]         dd0dd4405bd6aff8a35f04a6db75c81691f8b3a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd0dd44 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild