$ git clone -n https://src.fedoraproject.org/rpms/pspg.git /var/lib/mock/f45-build-28999-634/root/chroot_tmpdir/scmroot/pspg
Cloning into '/var/lib/mock/f45-build-28999-634/root/chroot_tmpdir/scmroot/pspg'...
$ git fetch origin ddce08cf39cc03c7c4f5edcd577ddeb4c1e07a0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pspg
 * [new ref]         ddce08cf39cc03c7c4f5edcd577ddeb4c1e07a0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ddce08c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild