$ git clone -n https://src.fedoraproject.org/rpms/python-leather.git /var/lib/mock/f45-build-31375-652/root/chroot_tmpdir/scmroot/python-leather
Cloning into '/var/lib/mock/f45-build-31375-652/root/chroot_tmpdir/scmroot/python-leather'...
$ git fetch origin 4e4b19bf227ae9d2c940fa347a7700343e90e67c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-leather
 * [new ref]         4e4b19bf227ae9d2c940fa347a7700343e90e67c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e4b19b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild