$ git clone -n https://src.fedoraproject.org/rpms/gp2c.git /var/lib/mock/f45-build-12930-444/root/chroot_tmpdir/scmroot/gp2c
Cloning into '/var/lib/mock/f45-build-12930-444/root/chroot_tmpdir/scmroot/gp2c'...
$ git fetch origin 06b180008cc74eb4aa55449e751c99b4b157a07d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gp2c
 * [new ref]         06b180008cc74eb4aa55449e751c99b4b157a07d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06b1800 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild