$ git clone -n https://src.fedoraproject.org/rpms/plasma-thunderbolt.git /var/lib/mock/f39-build-2054343-49108/root/chroot_tmpdir/scmroot/plasma-thunderbolt
Cloning into '/var/lib/mock/f39-build-2054343-49108/root/chroot_tmpdir/scmroot/plasma-thunderbolt'...
$ git fetch origin 601222b7f2f604a495ad2fa61ff01ec887dcb0c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-thunderbolt
 * [new ref]         601222b7f2f604a495ad2fa61ff01ec887dcb0c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 601222b 5.27.10