$ git clone -n https://src.fedoraproject.org/rpms/stun.git /var/lib/mock/f45-build-36513-706/root/chroot_tmpdir/scmroot/stun
Cloning into '/var/lib/mock/f45-build-36513-706/root/chroot_tmpdir/scmroot/stun'...
$ git fetch origin f66a89fd4f9078a01c00b077abe69efbd5ee3eb2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stun
 * [new ref]         f66a89fd4f9078a01c00b077abe69efbd5ee3eb2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f66a89f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild