$ git clone -n https://src.fedoraproject.org/rpms/koji-tool.git /var/lib/mock/f38-build-722231-98749/root/chroot_tmpdir/scmroot/koji-tool
Cloning into '/var/lib/mock/f38-build-722231-98749/root/chroot_tmpdir/scmroot/koji-tool'...
$ git fetch origin 0c54ba0fb8596e746e1963e26e554b935b8bc4f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/koji-tool
 * [new ref]         0c54ba0fb8596e746e1963e26e554b935b8bc4f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c54ba0 change bug reference to bugzilla