$ git clone -n https://src.fedoraproject.org/rpms/python-time-machine.git /var/lib/mock/f39-build-1539639-36443/root/chroot_tmpdir/scmroot/python-time-machine
Cloning into '/var/lib/mock/f39-build-1539639-36443/root/chroot_tmpdir/scmroot/python-time-machine'...
$ git fetch origin e7a112c7b0b7fc0bd75be5ee12eefdf6423adf62:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-time-machine
 * [new ref]         e7a112c7b0b7fc0bd75be5ee12eefdf6423adf62 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7a112c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild