$ git clone -n https://src.fedoraproject.org/rpms/gammu.git /var/lib/mock/f45-build-9417-403/root/chroot_tmpdir/scmroot/gammu
Cloning into '/var/lib/mock/f45-build-9417-403/root/chroot_tmpdir/scmroot/gammu'...
$ git fetch origin 9f0420de87895351f4ab8baabf0854076945ea9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gammu
 * [new ref]         9f0420de87895351f4ab8baabf0854076945ea9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f0420d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild