$ git clone -n https://src.fedoraproject.org/rpms/sg3_utils.git /var/lib/mock/f45-build-35845-699/root/chroot_tmpdir/scmroot/sg3_utils
Cloning into '/var/lib/mock/f45-build-35845-699/root/chroot_tmpdir/scmroot/sg3_utils'...
$ git fetch origin 40fc90d5b7ee0667f0aa751d2973dfa43a8baf7e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sg3_utils
 * [new ref]         40fc90d5b7ee0667f0aa751d2973dfa43a8baf7e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40fc90d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild