$ git clone -n https://src.fedoraproject.org/rpms/alsamixergui.git /var/lib/mock/f41-build-side-1-2631574-25721/root/chroot_tmpdir/scmroot/alsamixergui
Cloning into '/var/lib/mock/f41-build-side-1-2631574-25721/root/chroot_tmpdir/scmroot/alsamixergui'...
$ git fetch origin 879b7f0e1536848150e34728ca28a88f9d5281cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/alsamixergui
 * [new ref]         879b7f0e1536848150e34728ca28a88f9d5281cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 879b7f0 convert GPLv2+ license to SPDX