$ git clone -n https://src.fedoraproject.org/rpms/libicu74.git /var/lib/mock/f42-build-861857-170458/root/chroot_tmpdir/scmroot/libicu74
Cloning into '/var/lib/mock/f42-build-861857-170458/root/chroot_tmpdir/scmroot/libicu74'...
$ git fetch origin 53d20d45d997a6ad64d0b2d1b8d8818a9cdaf39d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libicu74
 * [new ref]         53d20d45d997a6ad64d0b2d1b8d8818a9cdaf39d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53d20d4 Initial import