$ git clone -n https://src.fedoraproject.org/rpms/python-aiosmtpd.git /var/lib/mock/f45-build-29314-637/root/chroot_tmpdir/scmroot/python-aiosmtpd
Cloning into '/var/lib/mock/f45-build-29314-637/root/chroot_tmpdir/scmroot/python-aiosmtpd'...
$ git fetch origin 428e87d476bd9e863a613f86b609aca583d94021:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-aiosmtpd
 * [new ref]         428e87d476bd9e863a613f86b609aca583d94021 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 428e87d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild