$ git clone -n https://src.fedoraproject.org/rpms/global.git /var/lib/mock/f45-build-11165-428/root/chroot_tmpdir/scmroot/global
Cloning into '/var/lib/mock/f45-build-11165-428/root/chroot_tmpdir/scmroot/global'...
$ git fetch origin 4bae3e3be34e4a1f57d2cdccdc1bef8e7e7bbd0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/global
 * [new ref]         4bae3e3be34e4a1f57d2cdccdc1bef8e7e7bbd0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4bae3e3 Require xemacs only on EPEL 8