$ git clone -n https://src.fedoraproject.org/rpms/golang-github-lestrrat-backoff-2.git /var/lib/mock/f40-build-2288101-55768/root/chroot_tmpdir/scmroot/golang-github-lestrrat-backoff-2
Cloning into '/var/lib/mock/f40-build-2288101-55768/root/chroot_tmpdir/scmroot/golang-github-lestrrat-backoff-2'...
$ git fetch origin b6d3e2a35f6a881f3b55a7d618684dd269fda3d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-lestrrat-backoff-2
 * [new ref]         b6d3e2a35f6a881f3b55a7d618684dd269fda3d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6d3e2a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild