$ git clone -n https://src.fedoraproject.org/rpms/nextcloud-client.git /var/lib/mock/f40-build-1325720-23538/root/chroot_tmpdir/scmroot/nextcloud-client
Cloning into '/var/lib/mock/f40-build-1325720-23538/root/chroot_tmpdir/scmroot/nextcloud-client'...
$ git fetch origin b21b2c0354f1daeb47706c79a6cfd5d32b7098c4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nextcloud-client
 * [new ref]         b21b2c0354f1daeb47706c79a6cfd5d32b7098c4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b21b2c0 Update to v3.13.0