$ git clone -n https://src.fedoraproject.org/rpms/reprepro.git /var/lib/mock/f39-build-1456743-32931/root/chroot_tmpdir/scmroot/reprepro
Cloning into '/var/lib/mock/f39-build-1456743-32931/root/chroot_tmpdir/scmroot/reprepro'...
$ git fetch origin 166bd912f4c296f4e34d7a83868a02834a5d4945:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/reprepro
 * [new ref]         166bd912f4c296f4e34d7a83868a02834a5d4945 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 166bd91 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild