$ git clone -n https://src.fedoraproject.org/rpms/loupe.git /var/lib/mock/f39-build-1589474-38234/root/chroot_tmpdir/scmroot/loupe
Cloning into '/var/lib/mock/f39-build-1589474-38234/root/chroot_tmpdir/scmroot/loupe'...
$ git fetch origin 535fdd48d61ec77da526e6aa02a31506a3b4d40b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/loupe
 * [new ref]         535fdd48d61ec77da526e6aa02a31506a3b4d40b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 535fdd4 Backport upstream MR #302 to fix printing