$ git clone -n https://src.fedoraproject.org/rpms/python-pexpect.git /var/lib/mock/f45-build-39489-735/root/chroot_tmpdir/scmroot/python-pexpect
Cloning into '/var/lib/mock/f45-build-39489-735/root/chroot_tmpdir/scmroot/python-pexpect'...
$ git fetch origin 4c48204f6d88e9ecfad17a3fbadf9586c0c5e515:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pexpect
 * [new ref]         4c48204f6d88e9ecfad17a3fbadf9586c0c5e515 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c48204 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild