$ git clone -n https://src.fedoraproject.org/rpms/nextcloud-client.git /var/lib/mock/f38-build-side-42-init-devel-759743-27691/root/chroot_tmpdir/scmroot/nextcloud-client
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-759743-27691/root/chroot_tmpdir/scmroot/nextcloud-client'...
$ git fetch origin 5e4e14cf5f404d96a8a6962fde585b8eeba301d1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nextcloud-client
 * [new ref]         5e4e14cf5f404d96a8a6962fde585b8eeba301d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e4e14c Update to v3.7.4