$ git clone -n https://src.fedoraproject.org/rpms/libkcddb.git /var/lib/mock/f42-build-871137-177465/root/chroot_tmpdir/scmroot/libkcddb
Cloning into '/var/lib/mock/f42-build-871137-177465/root/chroot_tmpdir/scmroot/libkcddb'...
$ git fetch origin 1990e070b3137543908936da6892c8e1f6b0ca28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libkcddb
 * [new ref]         1990e070b3137543908936da6892c8e1f6b0ca28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1990e07 24.12.2