$ git clone -n https://src.fedoraproject.org/rpms/python-slacker.git /var/lib/mock/f39-build-1606292-38612/root/chroot_tmpdir/scmroot/python-slacker
Cloning into '/var/lib/mock/f39-build-1606292-38612/root/chroot_tmpdir/scmroot/python-slacker'...
$ git fetch origin 560c99cbc64995a2a8e97c6a691368f9e22217be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-slacker
 * [new ref]         560c99cbc64995a2a8e97c6a691368f9e22217be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 560c99c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild