$ git clone -n https://src.fedoraproject.org/rpms/firetools.git /var/lib/mock/f45-build-8980-397/root/chroot_tmpdir/scmroot/firetools
Cloning into '/var/lib/mock/f45-build-8980-397/root/chroot_tmpdir/scmroot/firetools'...
$ git fetch origin eead31a7b4d134ea4d24e292d47490a6555af4f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/firetools
 * [new ref]         eead31a7b4d134ea4d24e292d47490a6555af4f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eead31a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild