$ git clone -n https://src.fedoraproject.org/rpms/python-Mastodon.git /var/lib/mock/f45-build-29207-636/root/chroot_tmpdir/scmroot/python-Mastodon
Cloning into '/var/lib/mock/f45-build-29207-636/root/chroot_tmpdir/scmroot/python-Mastodon'...
$ git fetch origin 78ab593d8e40ad1e07f31a4b8e38b0ac64449ec8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-Mastodon
 * [new ref]         78ab593d8e40ad1e07f31a4b8e38b0ac64449ec8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78ab593 2.2.2