$ git clone -n https://src.fedoraproject.org/rpms/trojita.git /var/lib/mock/f38-build-side-42-init-devel-817433-28339/root/chroot_tmpdir/scmroot/trojita
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-817433-28339/root/chroot_tmpdir/scmroot/trojita'...
$ git fetch origin 0ae9ef20925ca5ecfcadbec684087dc45df33d2c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/trojita
 * [new ref]         0ae9ef20925ca5ecfcadbec684087dc45df33d2c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ae9ef2 Rebuild (grantlee-qt5)