$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Spelling.git /var/lib/mock/f45-build-26857-619/root/chroot_tmpdir/scmroot/perl-Test-Spelling
Cloning into '/var/lib/mock/f45-build-26857-619/root/chroot_tmpdir/scmroot/perl-Test-Spelling'...
$ git fetch origin ae77ebed7a6b9bd7de71469984bc2598d6ad3679:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Spelling
 * [new ref]         ae77ebed7a6b9bd7de71469984bc2598d6ad3679 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae77ebe Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild