$ git clone -n https://src.fedoraproject.org/rpms/kf5-kcodecs.git /var/lib/mock/f45-build-14832-464/root/chroot_tmpdir/scmroot/kf5-kcodecs
Cloning into '/var/lib/mock/f45-build-14832-464/root/chroot_tmpdir/scmroot/kf5-kcodecs'...
$ git fetch origin 50790bcc18e2a19f7cae7a840fc845fecda2b39b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kcodecs
 * [new ref]         50790bcc18e2a19f7cae7a840fc845fecda2b39b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 50790bc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild