$ git clone -n https://src.fedoraproject.org/rpms/magic.git /var/lib/mock/f41-build-856841-167776/root/chroot_tmpdir/scmroot/magic
Cloning into '/var/lib/mock/f41-build-856841-167776/root/chroot_tmpdir/scmroot/magic'...
$ git fetch origin ebedd6b876f09b3a5fad7f107bd47c38ebb09bdc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/magic
 * [new ref]         ebedd6b876f09b3a5fad7f107bd47c38ebb09bdc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ebedd6b 8.3.492