$ git clone -n https://src.fedoraproject.org/rpms/kf5-kmediaplayer.git /var/lib/mock/f38-build-712925-94425/root/chroot_tmpdir/scmroot/kf5-kmediaplayer
Cloning into '/var/lib/mock/f38-build-712925-94425/root/chroot_tmpdir/scmroot/kf5-kmediaplayer'...
$ git fetch origin ce418867fb35cf10139c85faa41c2ba943f73d69:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kmediaplayer
 * [new ref]         ce418867fb35cf10139c85faa41c2ba943f73d69 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce41886 5.105.0