$ git clone -n https://src.fedoraproject.org/rpms/swtpm.git /var/lib/mock/f41-build-1049513-19179/root/chroot_tmpdir/scmroot/swtpm
Cloning into '/var/lib/mock/f41-build-1049513-19179/root/chroot_tmpdir/scmroot/swtpm'...
$ git fetch origin 06eed0c6801c8b96a11315100726fc7d29a3124e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/swtpm
 * [new ref]         06eed0c6801c8b96a11315100726fc7d29a3124e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06eed0c Update to v0.9.0 release