$ git clone -n https://src.fedoraproject.org/rpms/swtpm.git /var/lib/mock/f40-build-1138059-20803/root/chroot_tmpdir/scmroot/swtpm
Cloning into '/var/lib/mock/f40-build-1138059-20803/root/chroot_tmpdir/scmroot/swtpm'...
$ git fetch origin 3ec0825b4fce501e473f66535bd5e385bc5ce2a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/swtpm
 * [new ref]         3ec0825b4fce501e473f66535bd5e385bc5ce2a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ec0825 Update to v0.9.0 release