$ git clone -n https://src.fedoraproject.org/rpms/gawkextlib.git /var/lib/mock/f45-build-9651-407/root/chroot_tmpdir/scmroot/gawkextlib
Cloning into '/var/lib/mock/f45-build-9651-407/root/chroot_tmpdir/scmroot/gawkextlib'...
$ git fetch origin 8dd802d65abb8668316927d48bb4825faabb78c4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gawkextlib
 * [new ref]         8dd802d65abb8668316927d48bb4825faabb78c4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8dd802d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild