$ git clone -n https://src.fedoraproject.org/rpms/libcryptui.git /var/lib/mock/f42-build-side-1-3537725-46560/root/chroot_tmpdir/scmroot/libcryptui
Cloning into '/var/lib/mock/f42-build-side-1-3537725-46560/root/chroot_tmpdir/scmroot/libcryptui'...
$ git fetch origin e619fd98ae5824e1ae07a064cd598fe88a59e02d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcryptui
 * [new ref]         e619fd98ae5824e1ae07a064cd598fe88a59e02d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e619fd9 Convert to %autorelease and %autochangelog