$ git clone -n https://src.fedoraproject.org/rpms/pamixer.git /var/lib/mock/f39-build-1508499-35384/root/chroot_tmpdir/scmroot/pamixer
Cloning into '/var/lib/mock/f39-build-1508499-35384/root/chroot_tmpdir/scmroot/pamixer'...
$ git fetch origin aa7d2e2d5b66949824b096b6fcac1c266b8d6121:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pamixer
 * [new ref]         aa7d2e2d5b66949824b096b6fcac1c266b8d6121 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa7d2e2 Initial import (#2179213)