$ git clone -n https://src.fedoraproject.org/rpms/libid3tag.git /var/lib/mock/f45-build-16323-485/root/chroot_tmpdir/scmroot/libid3tag
Cloning into '/var/lib/mock/f45-build-16323-485/root/chroot_tmpdir/scmroot/libid3tag'...
$ git fetch origin af3498c484c3d84a60959b1a34b740e2542aa420:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libid3tag
 * [new ref]         af3498c484c3d84a60959b1a34b740e2542aa420 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af3498c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild