$ git clone -n https://src.fedoraproject.org/rpms/cyrus-imapd.git /var/lib/mock/f40-build-780026-130658/root/chroot_tmpdir/scmroot/cyrus-imapd
Cloning into '/var/lib/mock/f40-build-780026-130658/root/chroot_tmpdir/scmroot/cyrus-imapd'...
$ git fetch origin 1f11bd7b846a606cd3fd4c3c31f6013fa364f8f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cyrus-imapd
 * [new ref]         1f11bd7b846a606cd3fd4c3c31f6013fa364f8f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f11bd7 Rebuild for ICU 74