$ git clone -n https://src.fedoraproject.org/rpms/php-pear-Mail.git /var/lib/mock/f45-build-28043-627/root/chroot_tmpdir/scmroot/php-pear-Mail
Cloning into '/var/lib/mock/f45-build-28043-627/root/chroot_tmpdir/scmroot/php-pear-Mail'...
$ git fetch origin 76530e654987eda9cf1e55c5c91bcaca6d23bbdf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pear-Mail
 * [new ref]         76530e654987eda9cf1e55c5c91bcaca6d23bbdf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 76530e6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild