$ git clone -n https://src.fedoraproject.org/rpms/bluez.git /var/lib/mock/f41-build-852859-166505/root/chroot_tmpdir/scmroot/bluez
Cloning into '/var/lib/mock/f41-build-852859-166505/root/chroot_tmpdir/scmroot/bluez'...
$ git fetch origin 761184fecae99bf7a024da1839642069cf26bbd1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bluez
 * [new ref]         761184fecae99bf7a024da1839642069cf26bbd1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 761184f Update to 5.78