$ git clone -n https://src.fedoraproject.org/rpms/python-archspec.git /var/lib/mock/f45-build-29401-637/root/chroot_tmpdir/scmroot/python-archspec
Cloning into '/var/lib/mock/f45-build-29401-637/root/chroot_tmpdir/scmroot/python-archspec'...
$ git fetch origin 93a7fe2d8222b5173216cfe9f9e7b8857aef03fd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-archspec
 * [new ref]         93a7fe2d8222b5173216cfe9f9e7b8857aef03fd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93a7fe2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild