$ git clone -n https://src.fedoraproject.org/rpms/gedit.git /var/lib/mock/f39-build-1563083-37472/root/chroot_tmpdir/scmroot/gedit
Cloning into '/var/lib/mock/f39-build-1563083-37472/root/chroot_tmpdir/scmroot/gedit'...
$ git fetch origin 173e9275432f6c6d474eabb0256d9d58743ca8e7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gedit
 * [new ref]         173e9275432f6c6d474eabb0256d9d58743ca8e7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 173e927 Update to 45.0